Don't check optval in getsockopt() when it call failed.
The value makes no sense.
While there, fix a memomry leak.

This patch is based on work by
Thadeu Lima de Souza Cascardo <cascardo@redhat.com>
It was manually merged, since the patch didn't apply cleanly.
The syscal was also added to the syntax highlighting files for
vim, emacs and bbedit.

Cleanup Testcases for sctp stream reconfiguration

Thanks to bz@ for providing a hint how to work around a FreeBSD
bug.

Test for checking if FIN is generated after connection close

Test for checking if RST is generated after connection close without read()

Feat/icmp

Test for blocking accept

Test for blocking read

Modifying the value of --tolerance_usecs flag seems rather appropriate
than using Relative Range in the script.

TODO: fix the error for the file descriptor

copied to the output string. The space required for that extra byte must also be
allocated.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@redhat.com>

Test for behavior when sending a packet with no TCP flag set

Sponsored by:	Netflix

Sponsored by:	Netflix

When using remote mode, eth0 only makes sense for Linux. So don't
use it on non-Linux platforms. Additionally, check for an interface
being specified and, when acting as a client, that a server address
is specified.

Sponsored by:	Netflix